Sliding door and window lock

ABSTRACT

A sliding door and/or sliding window locking device attaches to a door frame or window sill or other casing portions on the inside using wood or sheet metal screws. Locking of the sliding member or members occurs as a bolt of the locking device is moved to protrude into the path of each sliding member to abut its edge or is moved into a hole drilled into each sliding member structure. The locking device consists of: a small cast housing for containment and alignment of the bolt and having two base lugs drilled and countersunk to receive attachment screws; a bolt extending in each opposite direction beyond the housing and slidable in the housing having at least two portions of respective constant diameters and in line, the portion of larger diameter having a generous chamfer over about one third of its length, terminating in a radial plane end surface having a pointed tip in the center useful for punching a location marker indent before drilling a locking bolt receiving hole in the sliding member structure; a bushing of Teflon, Nylon or equivalent plastic for the bolt sized to provide a comfortable fit between the smaller diameter portion of the locking bolt and a respective counterbore portion of the interior of the housing; and a knob for finger manipulation blind bored undersized and press fitted to the smaller diameter of the bolt extending beyond the housing, the knob being knurled for a better grip.

United States Patent [191 Sodenkamp, Jr.

[54] SLIDING DOOR AND WINDOW LOCK [76] Inventor: Conrad Fred Sodenkamp, Jr.,

23423 156th S.E., Kent, Wash. 98031 [22] Filed: July 15, 1971 [21] Appl. No.: 163,009

Primary ExaminerMarvin A. Champion Assistant Examiner-William F. Pate, III Attorney-Roy E. Mattern, Jr.

[57] ABSTRACT A sliding door and/or sliding window locking device 51 Jan. 9, 1973 attaches to a door frame or window sill or other casing portions on the inside using wood or sheet metal screws. Locking of the sliding member or members occurs as a bolt of the locking device is moved to protrude into the path of each sliding member to abut its edge or is moved into a hole drilled into each sliding member structure.

The locking device consists of: a small cast housing for containment and alignment of the bolt and having two base lugs drilled and countersunk to receive attachment screws; a bolt extending in each opposite direction beyond the housing and slidable in the housing having at least two portions of respective constant diameters and in line, the portion of larger diameter having a generous chamfer over about one third of its length, terminating in a radial plane end surface having a pointed tip in the center useful for punching a location marker indent before drilling a locking bolt receiving hole in the sliding member structure; a bushing of Teflon, Nylon or equivalent plastic for the bolt sized to provide a comfortable fit between the smaller diameter portion of the locking bolt and a respective counterbore portion of the interior of the housing; and a knob for finger manipulation blind bored undersized and press fitted to the smaller diameter of the bolt extending beyond the housing, the knob being knurled for a better grip.

9 Claims, 6 Drawing Figures PATENTED JAN 9 B75 63 big, 64

INVENTOR. (bump If Hanan 4MP AIfORNEY SLIDING DOOR AND WINDOW LOCK BACKGROUND OF INVENTION Sliding doors and windows are currently enjoying great popularity in the building industry for houses, apartments and office buildings. When they are used for exterior openings and equipped with conventional locks, burglars are able to open the sliding member, other than by breaking the glass, by manipulation of lock components accessible from the outside, to gain entry quite simply and quickly. Better conventional key locks are available to fore-stall some of these easy entries; however they are expensive. Generally it is not practical to place a more expensive lock on each and every sliding door or window of a building. Therefore this lock is used on the interior and it is operated from the interior. In addition to locking outside sliding doors and windows, this lock is used to lock inner doors, such as those on closets and medicine cabinets at some distance above the floor level, to prevent entry by the young members of the family and for other purposes of inside control.

Prior to this time locks shown in patents such as H. Kunzs US Pat. No. 647,418; T. E. Bartons US. Pat. No. 1,113,946; F. E. Sparks U.S. Pat. No. 1,126,113; C. Szalais US. Pat. No. 1,432,640; D. A. Lynns US. Pat. No. 1,490,221 and N. M. Blake's US. Pat. No. 2,771,313 have been proposed. However, all these locks are rather complicated and are not too practical for use with the modern day hollow framed metallized construction of doors and windows. Whereas the preferred embodiment of this lock is simple to install with respect to either the metallized or wooden sliding doors and windows.

SUMMARY OF INVENTION After installation, the sliding door and window locks, each form a permanent means of locking outside sliding doors and outside sliding windows preventing unwanted entries. Also regarding inside sliding doors and panels, very young children are kept from entering places that are potentially dangerous to them such as basement stairs and medicine cabinets.

The small cast housing of the lock has the two drilled and countersunk base lugs to receive the attachment screws. In the upper center of this housing is a cylindrical opening completely through the housing and larger in diameter at one end than the other. The bolt is a solid rod having two portions of different diameters, the larger of which is generously chamfered and equipped with a small pointed tip in the center of the end face. The smaller diameter of the bolt with an encircling bushing is pushed into the larger bore of the housing until the bolt face is flush with the face of the housing. This effectively seats the bushing of the bolt within the bore of the housing. Thereafter the bushing provides a smooth traverse surface for the bolt within the bore. Once the bolt and bushing have been inserted into the bore the knurled knob is pressed onto the smaller diameter end of the bolt. The window or door lock is now in the configuration that the customer would find in the store. The knurled knob may be pulled until the large end of the bolt is flush with the face of the housing or it can be pushed until the large end of the bolt protrudes about one-half inch from the face of the housing.

To install the lock, to protrude the bolt end into the path of the sliding member, the user finds a convenient unobtrusive place just behind the closed sliding member and attaches the lock to rigid structure. Or for installation where the sliding members track is outside, similar to the sliding patio door, the lock is first located in a convenient unobtrusive place preferably against the nonmovable portion and attached to solid structure. With the sliding member securely locked closed the bolt is then struck firmly with a hammer causing its pointed tip to indent the stricken member. Removal of the lock then allows the member to be drilled at the marked location to receive the bolt. With the lock installed and the bolt in the receiving hole the sliding member cannot be moved. Pulling on the bolt to clear it away, thereafter allows normal operation of the sliding member.

DRAWINGS The preferred embodiments of the sliding door and window lock are illustrated in the accompanying drawings, wherein;

FIG. 1, is an exploded view'to illustrate the manner in which all components of the lock for locking sliding doors or sliding windows fit together;

FIG. 2, shows in perspective, the assembled lock for locking sliding doors and sliding windows;

FIG. 3, shows in perspective, with some portions removed, the lock for sliding doors or sliding windows as it is installed to block the movement of a sliding member;

FIG. 4, shows in perspective, with some portions removed, the lock for sliding doors and sliding windows as it is installed with the locking bolt located in a receiving hole on the frame structure of a sliding member;

FIG. 5, shows in side view, the method of punch marking the frame of the sliding member by striking the bolt to facilitate location of receiving hole to be subsequently drilled; and

FIG. 6, shows in side view, how the bolt is formed to receive and to grip a plastic knob.

PREFERRED EMBODIMENTS The preferred embodiment 20' provides a lock mechanism for sliding doors and sliding windows for exterior doors or windows or interior doors or panels, which will be economical to install and simple to operate providing a very adequate lock at all times.

It is composed of four principal separate parts. One part is a cast housing 22 having two base lugs 23 at its lower extremities which are drilled and countersunk 24 to receive attaching screws 25. The upper center of this housing has an upright portion 26 which is bored completely through with two concentric bores 27 and 28 of different diameters laid in a plane at right angles to the centerline of the drilled and countersunk holes 24 in lugs 23. Another part is a bolt 41 which is machined to two different diameters, the larger diameter portion 42, being approximately one-half the length of the smaller diameter portion 43, and the larger portion 42 is chamfered 44 for approximately one-third of its length to facilitate eventual alignment if any misalignment with the receiving hole 45 in the sliding members structure 46. The end surface 47 adjacent to the larger diameter 42 and the chamfered portion 44 has a pointed tip 48 used during installation of the lock, to form a punch mark in adjacent structure when the bolt is struck sharply by a hammer. Another part is the teflon, or equivalent, bushing 51 which is sized to fit over the smaller diameter 43, of bolt 41 and within the larger bore 27 of housing 22. Also another part is a knob 61 which is blind bored 62 slightly smaller in diameter than the small diameter 43 of bolt 41 for a forced fit and the periphery 63 is knurled 64 in a diamond pattern when the knob is made of steel. When knob 65 is made of a resilient material such as plastic the bolt is altered. In FIG. 6, bolt 66 has grooves 67 into which portions of plastic knob 65 cold flow to lock it in place following its undersize force fitting. Other than grooves 67, bolt 66 is similar to bolt 41.

GENERAL ASSEMBLY During assembly, bolt 41 has bushing 51 slid onto its smaller diameter 43. Then it is inserted into the bore 27 of the housing until it protrudes out the small bore 28. Pushing the bolt 41 until it is flush with the face 71 of housing 22 seats bushing 51 against the intersecting shoulder 72 between the two concentric bore portions. With bolt 41 held in that position knob 61 is press fitted onto the bolt by forcing its small diameter portion 43 into the blind bore 62 of the knob 61.

As shown in FIG. 3, after assembly, lock 20 may be installed so the bolt end will lay in the path of a door or window member 81. The lock 20 is rigidly attached to solid building structure 82 by attachment screws 25 adjacent to the end of the door or window sliding member 81 when it is in the fully closed position. Thereafter during use, pushing on knob 61 forces the bolt 41 into the path of the travelling sliding door or window member 81 to lock it, and conversely pulling on knob 61 removes the bolt 41 from its path to unlock it.

As shown in FIG. 4, during an installation of lock 20 where a sliding door or window member 91 moves on the outside of the fixed door or window member 92 such as is common with some patio sliding doors, lock 20 is rigidly attached to solid structure 93 preferably adjacent to the frame 94 of the sliding door or window member 91. With the sliding door or sliding window lock 20 rigidly attached and the sliding door or window member 91 fully closed, then bolt 41 is pushed until pointed tip 48 abuts frame 94 of sliding member 91. Then knob 61 is struck sharply with a hammer thus causing tip 48 to place a punch mark on the sliding member frame. Thereafter the sliding member is moved clear of the lock 20 and a receiving hole 45 is drilled into the frame 94 to receive bolt 41 to safely lock the door.

I claim:

1. A sliding door and sliding window lock arranged for mounting on an adjacent rigid structure to prevent any forceful opening of a sliding door or sliding window to gain an entry into a building, comprising;

a. a housing having a base to receive retaining fasteners and an opening from one end to the other bored to leave two portions of different diameter;

b. fasteners adapted to secure the housing to a rigid structure;

c. a bolt with two portions of different diameters sized to fit the respective two opening portions of the housing; d. a bushing sized to fit about the smaller diameter portion of the bolt and to fit inside the larger diameter bored portion of the housing;

e. a knob formed and press fitted to the smaller diameter of the bolt after the bolt and bushing have been assembled in the housing.

2. A lock, as claimed in claim 1, wherein the knob has a periphery formed with an indented pattern to enhance its gripping.

3. A lock, as claimed in claim 1, wherein the bolt has an end of the larger diameter portion chamfered for approximately one-third of its length to facilitate the entry of the bolt into the receiving hole of a sliding door or sliding window being locked.

4. A lock, as claimed in claim 1, wherein the bolt has a pointed tip on the flat end surface adjacent to the large diameter end to be used during installation of the lock to facilitate the location of a hole preparation tool used in making the receiving hole, the pointed tip being used as a setting punch.

5. A lock as claimed in claim 3, wherein the bolt has a pointed tip serving as a setting punch being located on a flat end surface of the bolt at the termination of the chamfered portion.

6. A sliding door and sliding window lock, as claimed in claim 1, mounted to keep a sliding window or sliding door locked as a portion of its bolt protrudes into the path of travel of the sliding window or sliding door.

7. A sliding door and sliding window lock, as claimed in claim 1, mounted so its bolt fits into a receiving hole formed in the sliding member to lock the sliding door or sliding window and thereby prevent unlawful opening from the outside.

8. A lock, as claimed in claim 1, wherein the bolt has grooves around the periphery of its small diameter to provide additional grip for the knob.

9. A lock, as claimed in claim 8, wherein the knob is resilient and upon installation its portions cold flow into the grooves of the bolt. 

1. A sliding door and sliding window lock arranged for mounting on an adjacent rigid structure to prevent any forceful opening of a sliding door or sliding window to gain an entry into a building, comprising; a. a housing having a base to receive retaining fasteners and an opening from one end to the other bored to leave two portions of different diameter; b. fasteners adapted to secure the housing to a rigid structure; c. a bolt with two portions of different diameters sized to fit the respective two opening portions of the housing; d. a bushing sized to fit about the smaller diameter portion of the bolt and to fit inside the larger diameter bored portion of the housing; e. a knob formed and press fitted to the smaller diameter of the bolt after the bolt and bushing have been assembled in the housing.
 2. A lock, as claimed in claim 1, wherein tHe knob has a periphery formed with an indented pattern to enhance its gripping.
 3. A lock, as claimed in claim 1, wherein the bolt has an end of the larger diameter portion chamfered for approximately one-third of its length to facilitate the entry of the bolt into the receiving hole of a sliding door or sliding window being locked.
 4. A lock, as claimed in claim 1, wherein the bolt has a pointed tip on the flat end surface adjacent to the large diameter end to be used during installation of the lock to facilitate the location of a hole preparation tool used in making the receiving hole, the pointed tip being used as a setting punch.
 5. A lock as claimed in claim 3, wherein the bolt has a pointed tip serving as a setting punch being located on a flat end surface of the bolt at the termination of the chamfered portion.
 6. A sliding door and sliding window lock, as claimed in claim 1, mounted to keep a sliding window or sliding door locked as a portion of its bolt protrudes into the path of travel of the sliding window or sliding door.
 7. A sliding door and sliding window lock, as claimed in claim 1, mounted so its bolt fits into a receiving hole formed in the sliding member to lock the sliding door or sliding window and thereby prevent unlawful opening from the outside.
 8. A lock, as claimed in claim 1, wherein the bolt has grooves around the periphery of its small diameter to provide additional grip for the knob.
 9. A lock, as claimed in claim 8, wherein the knob is resilient and upon installation its portions cold flow into the grooves of the bolt. 